MINOR: add github action trigger

[waynexia]

Signed-off-by: Ruihang Xia waynestxia@gmail.com

Which issue does this PR close?

Ref #3321.

Rationale for this change

GitHub Action will only run on PR updating, we cannot trigger one on demand manually. This is inconvenient if we want to run one on master or without submitting a PR.

I've tried this patch in my fork repo, now I can see this button:

What changes are included in this PR?

Add an [action trigger](https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_dispatch] that allows us to trigger an action manually.

Are there any user-facing changes?

No

[andygrove]

test failure caused by #3327

[alamb]

TIL https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_dispatch

[alamb]

Thanks @waynexia -- this looks great.

[alamb]

I took the liberty of merging this branch to master -- hope to merge it when green

[codecov-commenter]

Codecov Report

Merging #3323 (9140639) into master (70e702c) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #3323 +/- ##
==========================================
- Coverage 85.81% 85.81% -0.01% 
==========================================
Files 294 294 Lines 53764 53764 ==========================================
- Hits 46136 46135 -1 - Misses 7628 7629 +1 

Impacted Files	Coverage Δ
datafusion/expr/src/logical_plan/plan.rs	78.05% <0.00%> (-0.17%)	⬇️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[ursabot]

Benchmark runs are scheduled for baseline = 70e702c and contender = e0a765d. e0a765d is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

[waynexia]

Thanks ❤️