Global variables in public inputs

[LHerskind]

Description

Addresses #826

• Adds chainid and version into tx_context such that it becomes part of CombinedConstantData in the public inputs.
• Adds chainid, version, blocknumber and timestamp to a new GlobalVariables in the RollupConstantData
• In base rollup add checks that kernel chainid and version matches that from constants.

The values in global variables will be constrained from L1, separately, see #824 for more information on that.

Checklist:

• I have reviewed my diff in github, line by line.
• Every change is related to the PR description.
• I have linked this pull request to the issue(s) that it resolves.
• There are no unexpected formatting changes, superfluous debug logs, or commented-out code.
• The branch has been merged or rebased against the head of its merge target.
• I'm happy for the PR to be merged at the reviewer's next convenience.

[LHerskind]

Replaced by #882