feat(security-command-center): add v2 version of SetMuteUndefinedFinding.java

[hegemonic]

Description

Adds a v2 equivalent of security-command-center/snippets/src/main/java/muteconfig/SetMuteUndefinedFinding.java.

Checklist

• [x] I have followed Sample Format Guide
• [x] pom.xml parent set to latest shared-configuration
• [x] Appropriate changes to README are included in PR
• [ ] These samples need a new API enabled in testing projects to pass (let us know which ones)
• [ ] These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• [x] Tests pass: mvn clean verify required
• [x] Lint passes: mvn -P lint checkstyle:check required
• [ ] Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• [ ] This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• [ ] This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• [x] Please merge this PR for me once it is approved

[hegemonic]

Blocked until #9580 is merged.

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 1 region tag.

• security-command-center/snippets/src/main/java/vtwo/muteconfig/SetMuteUndefinedFinding.java:19, tag securitycenter_set_mute_undefined_v2

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[hegemonic]

Blocked until #9580 is merged.

That PR was merged, and this one is ready to review.

[hegemonic]

@telpirion Friendly ping.