Port PR from PBS-Java: Relax VAST tag matching for handling

[cross-repo-issue-creation[bot]]

A PR was merged over on PBS-Java

• https://github.com/prebid/prebid-server-java/pull/3059
• timestamp: 2024-03-19T12:24:33Z

[bsardo]

@Pubmatic-Dhruv-Sonone is picking this up and will determine if any change is needed. As discussed, it is possible the library we use is tolerant of extra spaces.