tests: Install tools with --locked option

[zulinx86]

Changes

Install cargo tools with --locked option.

Reason

Without --locked option, installation cargo tools may fail for some reasons. --locked option is useful for reproducible installation since it ensures to use the exact same set of dependencies.
https://doc.rust-lang.org/cargo/commands/cargo-install.html#dealing-with-the-lockfile

For example, on v1.5 and v1.6, the installation failed due to an older rustc version.

error: failed to compile `cargo-audit v0.20.0`, intermediate artifacts can be found at `/tmp/cargo-installORO8R6`
--
  |  
  | Caused by:
  | package `clap_derive v4.5.0` cannot be built because it requires rustc 1.74 or newer, while the currently active rustc version is 1.70.0
  | Try re-running cargo install with `--locked`
  | error: failed to compile `cargo-deny v0.14.11`, intermediate artifacts can be found at `/tmp/cargo-installioMzbq`
  |  
  | Caused by:
  | package `clap_builder v4.5.1` cannot be built because it requires rustc 1.74 or newer, while the currently active rustc version is 1.70.0
  | Try re-running cargo install with `--locked`
  | error: failed to compile `grcov v0.8.19`, intermediate artifacts can be found at `/tmp/cargo-installOqwGlC`
  |  
  | Caused by:
  | package `clap_derive v4.5.0` cannot be built because it requires rustc 1.74 or newer, while the currently active rustc version is 1.70.0
  | Try re-running cargo install with `--locked`
  | error: failed to compile `cargo-sort v1.0.9`, intermediate artifacts can be found at `/tmp/cargo-install8DeK7Q`
  |  
  | Caused by:
  | package `clap_lex v0.7.0` cannot be built because it requires rustc 1.74 or newer, while the currently active rustc version is 1.70.0
  | Try re-running cargo install with `--locked`
  | Summary Failed to install cargo-audit, cargo-deny, grcov, cargo-sort (see error(s) above).
  | error: some crates failed to install

This is to be backported to v1.5 and v1.6.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the Apache 2.0 license. For more information on following Developer
Certificate of Origin and signing off your commits, please check
CONTRIBUTING.md.

PR Checklist

• [ ] If a specific issue led to this PR, this PR closes the issue.
• The description of changes is clear and encompassing.
• [ ] Any required documentation changes (code and docs) are included in this
  PR.
• [ ] API changes follow the Runbook for Firecracker API changes.
• [ ] User-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.
• [ ] New TODOs link to an issue.
• Commits meet
  contribution quality standards.

---

• This functionality cannot be added in rust-vmm.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c403628) 81.54% compared to head (75afd10) 81.56%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4462      +/-   ##
==========================================
+ Coverage   81.54%   81.56%   +0.02%     
==========================================
  Files         243      243              
  Lines       29542    29542              
==========================================
+ Hits        24089    24095       +6     
+ Misses       5453     5447       -6     

Flag	Coverage Δ
4.14-c5n.metal	78.86% <ø> (?)
4.14-c7g.metal	?
4.14-m5d.metal	?
4.14-m5n.metal	78.85% <ø> (?)
4.14-m6a.metal	77.98% <ø> (ø)
4.14-m6g.metal	76.96% <ø> (ø)
4.14-m6i.metal	78.85% <ø> (ø)
4.14-m7g.metal	76.96% <ø> (?)
5.10-c5n.metal	81.52% <ø> (?)
5.10-c7g.metal	?
5.10-m5d.metal	?
5.10-m5n.metal	81.51% <ø> (?)
5.10-m6a.metal	80.74% <ø> (ø)
5.10-m6g.metal	79.85% <ø> (ø)
5.10-m6i.metal	81.51% <ø> (ø)
5.10-m7g.metal	79.85% <ø> (?)
6.1-c5n.metal	81.52% <ø> (?)
6.1-c7g.metal	?
6.1-m5d.metal	?
6.1-m5n.metal	81.51% <ø> (?)
6.1-m6a.metal	80.74% <ø> (ø)
6.1-m6g.metal	79.85% <ø> (ø)
6.1-m6i.metal	81.51% <ø> (ø)
6.1-m7g.metal	79.85% <ø> (?)

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[wearyzen]

nit: commit message is missing something either : installation of cargo tools or installing cargo tools