Add an option to change reselect function

[NikitaSkrynnik]

Description

Add an ability to change connection modifications during a reselect, because vl3 healing should not delete NSE name

Issue link

networkservicemesh/cmd-nse-vl3-vpp#289

How Has This Been Tested?

• Added unit testing to cover
• Tested manually
• Tested by integration testing
• Have not tested

Types of changes

• Bug fix
• New functionality
• Documentation
• Refactoring
• CI

[codecov]

Codecov Report

Attention: Patch coverage is 69.23077% with 4 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (main@608b1b5). Click here to learn what that means.

❗ Current head dbf3870 differs from pull request most recent head abc0fc4. Consider uploading reports for the commit abc0fc4 to get more accurate results

Files	Patch %	Lines
pkg/networkservice/common/begin/options.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1585   +/-   ##
=======================================
  Coverage        ?   67.27%           
=======================================
  Files           ?      262           
  Lines           ?    12464           
  Branches        ?        0           
=======================================
  Hits            ?     8385           
  Misses          ?     3554           
  Partials        ?      525           

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[glazychev-art]

Can we add a test with a custom ReselectFunc?

[denis-tingaikin]

As I can see, CI failed 12 times in a row; it looks like we have problems with these changes.