[enhance](meta-service)add bvar for fdb process status

[koarz]

What problem does this PR solve?

Issue Number: close #xxx

Related PR: #xxx

Problem Summary:

g_bvar_fdb_process_status_int，g_bvar_fdb_process_status_float these two mBvars show the process status from fdb_status

this pr handle these metric

"processes":{
"09ca90b9f3f413e5816b2610ed8b465d":{
..."cpu":{
"usage_cores":0.0012292
},
"disk":{
"busy":0.0085999800000000001,
"free_bytes":490412584960,
"reads":{
"counter":854857,
"hz":0,
"sectors":0
},
"total_bytes":527295578112,
"writes":{
"counter":73765457,
"hz":26.1999,
"sectors":1336
}
},
..."memory":{
"available_bytes":3065090867,
"limit_bytes":8589934592,
"rss_bytes":46551040,
"unused_allocated_memory":655360,
"used_bytes":122974208
},
...

# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="memory",metric="available_bytes"} 1073741824
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="writes_counter"} 117339905
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="memory",metric="used_bytes"} 213848064
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="reads_counter"} 19812058
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="memory",metric="rss_bytes"} 60182528
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="memory",metric="unused_allocated_memory"} 0
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="memory",metric="limit_bytes"} 1073741824
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="writes_sectors"} 225616
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="reads_sectors"} 58888
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="free_bytes"} 189571883008
# HELP fdb_process_status_int
# TYPE fdb_process_status_int gauge
fdb_process_status_int{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="total_bytes"} 471412600832
...
# HELP fdb_process_status_float
# TYPE fdb_process_status_float gauge
fdb_process_status_float{process_id="16fb8a9e8dd5098537e422554fa51b70",component="cpu",metric="usage_cores"} 0.0155129
# HELP fdb_process_status_float
# TYPE fdb_process_status_float gauge
fdb_process_status_float{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="busy"} 0.353599
# HELP fdb_process_status_float
# TYPE fdb_process_status_float gauge
fdb_process_status_float{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="writes_hz"} 325.399
# HELP fdb_process_status_float
# TYPE fdb_process_status_float gauge
fdb_process_status_float{process_id="16fb8a9e8dd5098537e422554fa51b70",component="disk",metric="reads_hz"} 321.399

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[Thearas]

Thank you for your contribution to Apache Doris.
Don't know what should be done next? See How to process your PR.

Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[koarz]

run buildall

[koarz]

run buildall

[hello-stephen]

Cloud UT Coverage Report

Increment line coverage 100.00% (59/59) 🎉

Increment coverage report
Complete coverage report

Category	Coverage
Function Coverage	83.09% (1228/1478)
Line Coverage	67.71% (21328/31501)
Region Coverage	67.30% (10567/15702)
Branch Coverage	56.67% (5562/9814)

[koarz]

run buildall

[koarz]

run buildall

[hello-stephen]

Cloud UT Coverage Report

Increment line coverage 100.00% (50/50) 🎉

Increment coverage report
Complete coverage report

Category	Coverage
Function Coverage	80.65% (1259/1561)
Line Coverage	68.01% (21571/31719)
Region Coverage	67.29% (10632/15801)
Branch Coverage	56.84% (5585/9826)

[koarz]

run cloudut

[koarz]

run buildall

[doris-robot]

Cloud UT Coverage Report

Increment line coverage 94.12% (48/51) 🎉

Increment coverage report
Complete coverage report

Category	Coverage
Function Coverage	80.65% (1259/1561)
Line Coverage	67.94% (21553/31722)
Region Coverage	67.24% (10626/15802)
Branch Coverage	56.78% (5579/9826)

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.