Changed Tss-esapi dependency to be optional

[pawelpros]

Changed Tss-esapi dependency to be optional

• Bump: tss-esapi to version 7.5.1
• Tss-esapi dependency is now optional required only for attester and verifier features

How to use

Cargo.toml

[dependencies]
az-cvm-vtpm = { path = "../..", default-features = false }

Usage in main.rs

use az_cvm_vtpm::hcl;

fn main() {
    println!("bla: {:?}", hcl::ReportType::Tdx);
}

Testing done

1. Checked consistency:

cargo fmt --all -- --check
cargo clippy --all-targets --all-features --all -- -D warnings

2. Checked with semver-checks

cargo semver-checks
     Parsing az-cvm-vtpm v0.6.0 (current)
      Parsed [  17.589s] (current)
     Parsing az-cvm-vtpm v0.6.0 (baseline)
      Parsed [  16.161s] (baseline)
    Checking az-cvm-vtpm v0.6.0 -> v0.6.0 (no change)
     Checked [   0.023s] 89 checks: 88 pass, 1 fail, 0 warn, 0 skip

--- failure enum_variant_added: enum variant added on exhaustive enum ---

Description:
A publicly-visible enum without #[non_exhaustive] has a new variant.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#enum-variant-new
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.35.0/src/lints/enum_variant_added.ron

Failed in:
  variant ReportError:NvWriteFailed in /azure-cvm-tooling/az-cvm-vtpm/src/vtpm/mod.rs:93

     Summary semver requires new major version: 1 major and 0 minor checks failed
    Finished [  33.792s] az-cvm-vtpm

3. Checked CoCo Trustee compilation using patched version