fix(release): support generic XML version tags in apply_versions.sh

[jinseopkim0]

Updates apply_versions.sh to use a generic XML tag replacement regex with backreferences. This allows the script to update dependency versions defined in custom XML properties (such as first-party-dependencies.version in libraries-bom/pom.xml), rather than only matching standard tags.

[gemini-code-assist]

Code Review

This pull request updates the version replacement logic in generation/apply_versions.sh to support arbitrary XML tags instead of only <version>. However, the current regular expression matches the first leaf XML tag on a line, which can cause XML corruption if a line contains multiple tags (such as both groupId and version). To prevent this, the reviewer suggests anchoring the match to the specific x-version-update comment on the same line.

[gemini-code-assist]

Issue: Potential XML Corruption on Lines with Multiple Tags

The current regular expression <\([^>]*\)>[^<]*</\1> matches the first leaf XML tag on the line, regardless of whether it is the tag intended for the version update.

If a line contains multiple tags (for example, a dependency definition on a single line or multiple properties), like:

<groupId>com.google.cloud</groupId> <version>1.0.0</version> <!-- x-version-update:my-dep:current -->

The regex will match <groupId>com.google.cloud</groupId> instead of <version>1.0.0</version>, resulting in the corruption of the groupId tag:

<groupId>1.2.3</groupId> <version>1.0.0</version> <!-- x-version-update:my-dep:current -->

Solution: Anchor the Match to the Comment

We can prevent this by anchoring the match to the specific x-version-update comment on the same line, ensuring that no other tags (i.e., no < characters) exist between the closing tag and the comment. This guarantees that only the tag immediately preceding the comment is updated.

Suggested change

	echo '/x-version-update:'"$K"':current/{s|<\([^>]*\)>[^<]*</\1>|<\1>'"$V"'</\1>|;}' >> "$SED_SCRIPT_FILE"
	echo '/x-version-update:'"$K"':current/{s|<\([^>]*\)>[^<]*</\1>\([^<]*x-version-update:'"$K"':current\)|<\1>'"$V"'</\1>\2|;}' >> "$SED_SCRIPT_FILE"