fix(api): make triggers with seriesByTag function require at least one argument with a strict equality

[mchrome]

Make triggers with seriesByTag function require at least one argument with a strict equality

This PR is intended to prevent Moira from saving too many metrics locally when someone creates/edits a trigger with a target that can match a lot of them.
With these changes seriesByTag must have at least one argument with equality operator and no wildcards.

Examples

Valid targets after the change

• movingAverage(groupByTags(seriesByTag('project=my-test-project'), 'max'), '10min')
• aliasByTags(seriesByTag('name=~*', 'tag1=val1', 'tag2=val2', 'tag3=val3*'),'tag')

Invalid targets after the change

• seriesByTag('name=ab.bc.*.cd.*.ef')
• aliasByTags(seriesByTag('name=~*'),'tag')
• aliasByTags(seriesByTag('name=~*', 'tag1~=*val1*', 'tag2=*val2*'),'tag')

[mchrome]

/build

[Tetrergeru]

/build

[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (493d7a1) 68.13% compared to head (b52ad01) 68.17%.
Report is 7 commits behind head on master.

❗ Current head b52ad01 differs from pull request most recent head 133f873. Consider uploading reports for the commit 133f873 to get more accurate results

Files	Patch %	Lines
api/dto/target.go	72.00%	5 Missing and 2 partials ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #988      +/-   ##
==========================================
+ Coverage   68.13%   68.17%   +0.03%     
==========================================
  Files         208      208              
  Lines       11789    11819      +30     
==========================================
+ Hits         8033     8058      +25     
- Misses       3272     3276       +4     
- Partials      484      485       +1     

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[github-actions]

Build and push Docker images with tag: 2024-02-27.5b4ff82