feat: Add multiple intra route tables

[jbrooks-sms]

Description

This adds multiple intra route tables per the number of intra subnets deployed.

Motivation and Context

This resolves an issue where multiple intra route tables are required such as when using them in a multiple availability zone inspection vpc. Each intra subnet needs to forward to the particular network firewall endpoint which is in the local availability zone

Breaking Changes

There are no breaking changes as this only creates the same number of route tables as intra subnets.

How Has This Been Tested?

• [ ] I have updated at least one of the examples/* to demonstrate and validate my change(s)
• [x] I have tested and validated these changes using one or more of the provided examples/* projects I have tested by running the seperate-route-tables example in this branch and outputs return everything as expected to include the multiple route table ids.
• [x] I have executed pre-commit run -a on my pull request

[aserakhi]

Very intrested with this feature, we are facing the same issues to manage routing NFW endpoints per AZ!

[github-actions[bot]]

This PR has been automatically marked as stale because it has been open 30 days with no activity. Remove stale label or comment or this PR will be closed in 10 days

[github-actions[bot]]

This PR was automatically closed because of stale in 10 days

[github-actions[bot]]

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