[fix][broker] Fix regex matching of namespace name which might contain a regex char

[lhotari]

Motivation

Topic list watcher subscribes to metadata store change events and matches the metadata path using a regex. The namespace name part might contain a special character such as . and without escaping, it could match other namespaces that it shouldn't match.

Modifications

Use Pattern.quote to escape the namespace name part in the pattern.

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.44%. Comparing base (1617bb2) to head (03f86cd).

Additional details and impacted files

@@            Coverage Diff             @@
##             master   #25136    +/-   ##
==========================================
  Coverage     74.43%   74.44%            
+ Complexity    34055    33673   -382     
==========================================
  Files          1899     1899            
  Lines        149737   149737            
  Branches      17410    17410            
==========================================
+ Hits         111463   111475    +12     
+ Misses        29388    29380     -8     
+ Partials       8886     8882     -4     

Flag	Coverage Δ
inttests	26.31% <0.00%> (+0.05%)	⬆️
systests	23.00% <0.00%> (-0.01%)	⬇️
unittests	73.99% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
...apache/pulsar/broker/resources/TopicResources.java	100.00% <100.00%> (ø)

... and 84 files with indirect coverage changes

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