Refactor rollup features

[tom2drum]

Description and Related Issue(s)

Resolves #1595

Proposed Changes

• NEXT_PUBLIC_IS_OPTIMISTIC_L2_NETWORK and NEXT_PUBLIC_IS_ZKEVM_L2_NETWORK replaced by NEXT_PUBLIC_ROLLUP_TYPE
• NEXT_PUBLIC_OPTIMISTIC_L2_WITHDRAWAL_URL renamed to NEXT_PUBLIC_ROLLUP_L2_WITHDRAWAL_URL
• NEXT_PUBLIC_L1_BASE_URL renamed to NEXT_PUBLIC_ROLLUP_L1_BASE_URL

Breaking or Incompatible Changes

• all l2<something> components and types are renamed to optimisticL2<something>
• L2 views for optimistic and zkEvm are grouped by their route names (e.g, deposits/optimisticL2/**)
• optimisticRollup and zkEvmRollup features are combined into rollup

Additional Information

• added file with list of deprecated ENVs

Checklist for PR author

• I have tested these changes locally.
• I added tests to cover any new functionality, following this guide
• Whenever I fix a bug, I include a regression test to ensure that the bug does not reappear silently.
• If I have added, changed, renamed, or removed an environment variable, I have updated the list of environment variables in the documentation and made the necessary changes to the validator script according to the guide