✨ Add support for comma-separated values on the same key for EC2 tag filters

[VasilSirakov]

Closes #4739

This adds the possibility of specifying comma-separated values for the same key in a include/exclude tag filter. Those filters can now be specified as follows:

ec2:tag:Name=name1,name2,name3

and

exclude:ec2:tag:Name=name1,name2,name3

We keep treating the filter as a single key : value so this is backwards compatible. We just expand the string value right before applying the filters.

Note:

There is a quirk with how filters are applied. Comma-separated values on the same key are applied with a logical OR. If we specify 2 tag filters on different keys, they are applied with a logical AND.

[github-actions]

Test Results

3 116 tests  +2   3 115 ✅ +2   1m 27s ⏱️ -1s
  371 suites ±0       1 💤 ±0 
   28 files   ±0       0 ❌ ±0 

Results for commit 250830f. ± Comparison against base commit a2fd4fd.

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