[SPARK-37084][SQL] Set spark.sql.files.openCostInBytes to bytesConf

[RabbidHY]

What changes were proposed in this pull request?

Set spark.sql.files.openCostInBytes to bytesConf.

Why are the changes needed?

The name is *InBytes, but it actually only accepts long type. This is confusing for users. After the changes, it can accept String as input which is more flexible to users.

Does this PR introduce any user-facing change?

No.

How was this patch tested?

Existing test.

[HyukjinKwon]

Can we add a simple test at ConfigEntrySuite to make sure byte configuration is able to take the long type numbers?

[JoshRosen]

+1; we could probably extend this existing test:

spark/core/src/test/scala/org/apache/spark/internal/config/ConfigEntrySuite.scala

Lines 90 to 97 in 4148fb5

	test("conf entry: bytes") {
	valconf=newSparkConf()
	valbytes=ConfigBuilder(testKey("bytes")).bytesConf(ByteUnit.KiB)
	.createWithDefaultString("1m")
	assert(conf.get(bytes) ===1024L)
	conf.set(bytes.key, "1k")
	assert(conf.get(bytes) ===1L)
	}

[HyukjinKwon]

Let's also file a JIRA, see also https://spark.apache.org/contributing.html

[HyukjinKwon]

ok to test

[HyukjinKwon]

Merged to master.

[SparkQA]

Kubernetes integration test starting
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[SparkQA]

Kubernetes integration test status failure
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[SparkQA]

Test build #144550 has finished for PR 34353 at commit 4003f0c.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[AmplabJenkins]

Can one of the admins verify this patch?