refactor: ignore mesh services without ready endpoints.

[cybwan]

Description:
ignore mesh services without ready endpoints.

Testing done:
Done

Affected area:

Functional Area
New Functionality	[ ]
CI System	[ ]
CLI Tool	[ ]
Certificate Management	[ ]
Control Plane	[X]
Demo	[ ]
Documentation	[ ]
Egress	[ ]
Ingress	[ ]
Install	[ ]
Networking	[ ]
Observability	[ ]
Performance	[ ]
SMI Policy	[ ]
Security	[ ]
Sidecar Injection	[ ]
Tests	[ ]
Upgrade	[ ]
Other	[ ]

Please answer the following questions with yes/no.

1. Does this change contain code from or inspired by another project? bo

2. Is this a breaking change? no

3. Has documentation corresponding to this change been updated in the fsm-docs repo (if applicable)? no

[mergify]

Merge Protections

Your pull request matches the following merge protections and will not be merged until they are valid.

🟢 Enforce conventional commit

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Make sure that we follow https://www.conventionalcommits.org/en/v1.0.0/

• title ~= ^(\[wip\]|\[backport\]|\[cherry-pick\])?( )?(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?:

🟢 Enforce verified commits

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Make sure that we have verified commits

• #commits-unverified = 0

🟢 Enforce linear history

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Make sure that we have a linear history, no merge commits are allowed

• linear-history

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Please upload report for BASE (release/v1.5@2a59b50). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
pkg/catalog/outbound_traffic_policies.go	50.00%	1 Missing ⚠️

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Additional details and impacted files

@@               Coverage Diff               @@
##             release/v1.5     #623   +/-   ##
===============================================
  Coverage                ?   14.75%           
===============================================
  Files                   ?      871           
  Lines                   ?    63512           
  Branches                ?        0           
===============================================
  Hits                    ?     9369           
  Misses                  ?    53959           
  Partials                ?      184           

Flag	Coverage Δ
unittests	14.75% <50.00%> (?)

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[reaver-flomesh]

/lgtm