fix: add filter for providerID on subscription repo, and remove unnecessary invoice event in syncer

[anujk14]

This PR solves a couple of issues:

1. We used to sync only the first subscription in our repository because the subscription repository did not use the providerID passed to it as input. This PR fixes that.
2. The event for "invoice created" cannot use the same provider id that is passed since the provider id there refers to invoice id, whereas the code written assumes that the id passed is a customer id. Due to issue (1), the "invoice created" event was anyway not getting triggered

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Name	Status	Preview	Comments	Updated (UTC)
frontier	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 29, 2024 10:08am

[coveralls]

Pull Request Test Coverage Report for Build 10613008149

Details

• 0 of 5 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.001%) to 9.528%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/store/postgres/billing_subscription_repository.go	0	5	0.0%

Totals
Change from base Build 10610777620:	-0.001%
Covered Lines:	10550
Relevant Lines:	110723

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💛 - Coveralls