chore(*) update Cargo structure for Dependabot

[thibaultcha]

End goal is improved integration with GitHub's security features:

1. Automated security updates of dependencies in our end-users Rust crates in lib/.
2. Automated periodic updates of dependencies in all Rust crates in lib/ and t/lib/ (end-users vs. test suite crates).

Changes:

• Split the single Cargo workspace we had in two: lib/ and t/lib. This helps separating production vs. development crates for Dependabot.
• Minor updates to auto/cargo to force it to use the same lib/ngx-wasm-rs/target/ directory as before instead of lib/target/ with the new workspace change.
• Update dependabot.yml to configure several jobs for automated version bumps (distinct from security bumps).
• Clean work/lib/wasm on make cleanup.
• Always copy SDK example filters to work/lib/wasm due to cleanup change.
• Rename the ngx-wasm-rs crate purely for consistency.
• New make update target for quick cargo update in all workspaces.

[codecov[bot]]

Codecov Report

Merging #475 (6a7f2ad) into main (e7769a0) will decrease coverage by 0.29437%. The diff coverage is n/a.

Additional details and impacted files

[](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/475?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) ```diff @@ Coverage Diff @@ ## main #475 +/- ## =================================================== - Coverage 90.43593% 90.14156% -0.29438% =================================================== Files 46 46 Lines 9818 9890 +72 =================================================== + Hits 8879 8915 +36 - Misses 939 975 +36 ``` [see 9 files with indirect coverage changes](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/475/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | [Flag](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/475/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | Coverage Δ | | |---|---|---| | [unit](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/475/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | `90.24390% <ø> (ø)` | | | [valgrind](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/475/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | `77.84247% <ø> (-2.89672%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong#carryforward-flags-in-the-pull-request-comment) to find out more.

[thibaultcha]

Ping @hishamhm @casimiro for ack of operational changes in this PR.

Ping @locao and @flrgh because I believe this may break the Gateway bazel builds of the Rust modules but I have not tried it yet.

[thibaultcha]

Building Kong Gateway with Wasmer or V8 is already broken as of today, so we will merge this without further consideration for the Bazel build system.