fix(style): ESRI Dynamic handles multiple styles with same label

[DamonU2]

Closes #2597

Description

Fixes issues with ESRI Dynamic layer styles. Default is now respected for class break styles, multiple entries for the same style are properly combined, and default values are better handled in class breaks.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

https://damonu2.github.io/geoview/demos-navigator.html?config=./configs/navigator/16-esri-dynamic.json
https://damonu2.github.io/geoview/add-layers.html

3af377be-801d-4ebf-9137-869b3080bfa5
88c1689b-9327-406e-860b-3d0e2dd518fa
3fffdd62-41e7-443c-b607-8d5825e12600
f38ca22a-2a3f-4e8a-86b5-e74f599e5cb6
000183ed-8864-42f0-ae43-c4313a860720 (Metal mines (ID: 4))

Checklist:

• I have build (rush build) and deploy (rush host) my PR
• I have connected the issues(s) to this PR
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have created new issue(s) related to the outcome of this PR is needed
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

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This change is 

[Alex-NRCan]

Reviewed 6 of 6 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @jolevesq)

[jolevesq]

Reviewed 6 of 6 files at r1, 2 of 2 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @DamonU2)