[BugFix] fixed ALTER STORAGE VOLUME [IF EXISTS] (backport #66691)

[mergify]

Why I'm doing:

According to this, the syntax is

ALTER STORAGE VOLUME [ IF EXISTS ] <storage_volume_name>
{ COMMENT = '<comment_string>'
| SET ("key" = "value"[,...]) }

But doesn't support IF EXISTS.

What I'm doing:

Fixes syntax to add IF EXISTS.

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 4.0
  • 3.5
  • 3.4
  • 3.3

---

Note

Implements IF EXISTS for ALTER STORAGE VOLUME and aligns not-found behavior across layers.

• Grammar: allow ALTER STORAGE VOLUME (IF EXISTS)? ...; AstBuilder passes the flag; AlterStorageVolumeStmt stores ifExists.
• Executor: visitAlterStorageVolumeStatement ignores MetaNotFoundException when IF EXISTS is set.
• Manager: StorageVolumeMgr.updateStorageVolume(...) now throws MetaNotFoundException if the volume is missing; signature updated and immutable-property checks preserved.
• Tests: updated unit tests to expect MetaNotFoundException; added SQL tests for ALTER STORAGE VOLUME IF EXISTS behavior.

^{Written by Cursor Bugbot for commit 487193f. This will update automatically on new commits. Configure here.}

---

This is an automatic backport of pull request #66691 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of bf73f06 has failed:

On branch mergify/bp/branch-4.0/pr-66691
Your branch is up to date with 'origin/branch-4.0'.

You are currently cherry-picking commit bf73f06fdc.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   fe/fe-core/src/main/java/com/starrocks/qe/DDLStmtExecutor.java
	modified:   fe/fe-core/src/main/java/com/starrocks/server/StorageVolumeMgr.java
	modified:   fe/fe-core/src/main/java/com/starrocks/sql/parser/AstBuilder.java
	modified:   fe/fe-core/src/main/java/com/starrocks/sql/parser/StarRocks.g4
	modified:   fe/fe-core/src/test/java/com/starrocks/server/SharedDataStorageVolumeMgrTest.java
	modified:   fe/fe-core/src/test/java/com/starrocks/server/SharedNothingStorageVolumeMgrTest.java
	modified:   test/sql/test_storage_volume/R/alter_storage_volume
	modified:   test/sql/test_storage_volume/T/alter_storage_volume

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   fe/fe-core/src/main/java/com/starrocks/sql/ast/AlterStorageVolumeStmt.java
	deleted by us:   fe/fe-core/src/test/java/com/starrocks/qe/RedirectStatusTest.java

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mergify]

@mergify[bot]: Backport conflict, please reslove the conflict and resubmit the pr

[mergify]

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