Fix: Added scroll strategy for overlay

[aneeshsharma]

Description

Added scrollStrategy to overlay to reposition the overlay while scrolling. This makes the overlay stick to the position on the page and scrolls along with the rest of the page.

This would only work if the cdk-scrollable directive is used on the container that is being scrolled through.

So, its not a universal solution, but cdk-scrollable needs to be added to any containers that have overlays that are facing this issue.

[aneeshsharma]

For reference, this is where I found the solution.

angular/components#6157 (comment)

angular/components#6157

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7080b66) 81.71% compared to head (33287f7) 81.71%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2601   +/-   ##
=======================================
  Coverage   81.71%   81.71%           
=======================================
  Files         928      928           
  Lines       20794    20795    +1     
  Branches     3137     3137           
=======================================
+ Hits        16991    16992    +1     
  Misses       3662     3662           
  Partials      141      141           

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[github-actions]

Test Results

    4 files  ±0    316 suites  ±0   32m 45s ⏱️ -8s
1 136 tests ±0  1 136 ✅ ±0  0 💤 ±0  0 ❌ ±0 
1 146 runs  ±0  1 146 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 33287f7. ± Comparison against base commit 7080b66.