fix(router-store): ignore trailing slash when comparing routes

[alex-okrushko]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngrx/platform/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Documentation has been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

Ignore trailing slash (/) when comparing URLs in the navigateIfNeed method of the router-store.

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

proceeds with re-navigation, which can lead to infinite loop if there's a guard on / or `` path (root).

Closes #2829

What is the new behavior?

Doesn't navigate if the changes in Store lead to the URL being the same as the current one (previously only the exact match would've prevented it).

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[damienwebdev]

Commit message has a typo, but otherwise the code LGTM.

[brandonroberts]

Also related to #1781