Fix hash router for urls ending with a hash

[birkskyum]

Closes #4732

• Hash router adds second # if url ends with a #. #4732

I've added a test for this, and a fix which is to modify the regex that recognize the hash. The section following the hashtag should be zero/one/more chars (.*), instead of one/more chars (.+).

Result before this PR:
http://localhost:9966/test/examples/cluster.html##3/40.67/-103.59

Result after this PR:
http://localhost:9966/test/examples/cluster.html#3/40.67/-103.59

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.02%. Comparing base (ca4e603) to head (4ff9eaa).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4730      +/-   ##
==========================================
+ Coverage   87.75%   88.02%   +0.27%     
==========================================
  Files         247      247              
  Lines       33656    33656              
  Branches     2201     2160      -41     
==========================================
+ Hits        29536    29627      +91     
+ Misses       3132     3053      -79     
+ Partials      988      976      -12     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[HarelM]

It's hard to review regexp changes...
I hope this won't break previous behavior when # was not present...

[HarelM]

Please add a changelog item.

[birkskyum]

It's hard to review regexp changes... I hope this won't break previous behavior when # was not present...

All the existing tests run from a localhost/ url without a hashtag and they still pass, so that gives me some confidence nothing will break. To make sure the init behavior is as expected, I've added 5 more init tests for different url endings and a changelog