Exclude crates failing to build

[lalitb]

Excluding crates failing to build in the current pipeline. This may be due to the rust toolchain upgrade, or the dependency upgrades. These can be incrementally brought back once they are fixed. Refer #64 for some of the errors tried fixing, but there are somewhat more.

Merge requirement checklist

• [x] CONTRIBUTING guidelines followed
• [ ] Unit tests added/updated (if applicable)
• [ ] Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• [ ] Changes in public API reviewed (if applicable)