feat(source-scan): git checks, git metadata

[dj8yfo]

Summary of changes:

• git dirty check copied to cargo near build flow, it produces a warning, unlike the error in cargo near deploy flow
• added source_code_git_url field to reproducible build metadata
• git pushed to remote check logic reworked
• repo is opened and HEAD is determined
• relative path of contract within repo is determined
• CARGO_NEAR_SOURCE_CODE_SNAPSHOT (adapted from cargo::core::SourceId) and CARGO_NEAR_CONTRACT_PATH are exported into container
• github, package in root of a repo: https://github.com/dj8yfo/sample_no_workspace/tree/6c5ae44150ce51349a95e1605ba053c4fe53cf28
• github, package in subpath in repo : https://github.com/dj8yfo/sample_workspace/tree/b2d5580037c84fd4038b467564a9be9e520611de/self-updates/update
• github, package in submodule in repo : https://github.com/dj8yfo/sample_workspace_with_submodules/tree/3d87c81517e1e23a5716c300fe4789b1aafc4c6f/self-updates
• bitbucket, package in root of a repo: https://bitbucket.org/dj8yfomule/scratch_check_git/src/master/

[dj8yfo]

Based on contracts deployed from sdk pr: near/near-sdk-rs#1178 :

near contract call-function as-read-only sample-crate.testnet contract_source_metadata json-args {} network-config testnet now

=>

{
  "build_info": {
    "build_command": [
      "cargo",
      "near",
      "build",
      "--no-release",
      "--no-doc"
    ],
    "build_environment": "dj8yfo/sourcescan:0.x.x-dev-cargo-near-build-cmd-repo@sha256:e6b0ba022673c5845df842173b005426573c9583f78cd8a1782462e59807e05a",
    "contract_path": "",
    "source_code_snapshot": "git+https://github.com/dj8yfo/sample_no_workspace.git?rev=6c5ae44150ce51349a95e1605ba053c4fe53cf28"
  },
  "link": "https://github.com/dj8yfo/sample_no_workspace/tree/6c5ae44150ce51349a95e1605ba053c4fe53cf28",
  "standards": [
    {
      "standard": "nep330",
      "version": "1.2.0"
    }
  ],
  "version": "0.7.7"
}

---

near contract call-function as-read-only sample-subpath-in-repo.testnet contract_source_metadata json-args {} network-config testnet now

=>

{
  "build_info": {
    "build_command": [
      "cargo",
      "near",
      "build",
      "--no-release",
      "--no-doc"
    ],
    "build_environment": "dj8yfo/sourcescan:0.x.x-dev-cargo-near-build-cmd-repo@sha256:e6b0ba022673c5845df842173b005426573c9583f78cd8a1782462e59807e05a",
    "contract_path": "self-updates/update",
    "source_code_snapshot": "git+https://github.com/dj8yfo/sample_workspace.git?rev=b2d5580037c84fd4038b467564a9be9e520611de"
  },
  "link": "https://github.com/dj8yfo/sample_workspace/tree/b2d5580037c84fd4038b467564a9be9e520611de",
  "standards": [
    {
      "standard": "nep330",
      "version": "1.2.0"
    }
  ],
  "version": "1.7.7"
}

---

near contract call-function as-read-only sample-crate-in-submodule.testnet contract_source_metadata json-args {} network-config testnet now 

=>

{
  "build_info": {
    "build_command": [
      "cargo",
      "near",
      "build",
      "--no-release",
      "--no-doc"
    ],
    "build_environment": "dj8yfo/sourcescan:0.x.x-dev-cargo-near-build-cmd-repo@sha256:e6b0ba022673c5845df842173b005426573c9583f78cd8a1782462e59807e05a",
    "contract_path": "self-updates/update",
    "source_code_snapshot": "git+https://github.com/dj8yfo/sample_workspace_with_submodules.git?rev=3d87c81517e1e23a5716c300fe4789b1aafc4c6f"
  },
  "link": "https://github.com/dj8yfo/sample_workspace_with_submodules/tree/3d87c81517e1e23a5716c300fe4789b1aafc4c6f",
  "standards": [
    {
      "standard": "nep330",
      "version": "1.2.0"
    }
  ],
  "version": "1.0.0"
}

---

near contract call-function as-read-only bitbucket-scratch.testnet contract_source_metadata json-args {} network-config testnet now

=>

{
  "build_info": {
    "build_command": [
      "cargo",
      "near",
      "build",
      "--no-release",
      "--no-doc"
    ],
    "build_environment": "dj8yfo/sourcescan:0.x.x-dev-cargo-near-build-cmd-repo@sha256:e6b0ba022673c5845df842173b005426573c9583f78cd8a1782462e59807e05a",
    "contract_path": "",
    "source_code_snapshot": "git+https://feepdake27@bitbucket.org/dj8yfomule/scratch_check_git.git?rev=219ac475a016eedae17d5f8600cec1b77d64a918"
  },
  "link": "https://bitbucket.org/dj8yfomule/scratch_check_git/src/master/",
  "standards": [
    {
      "standard": "nep330",
      "version": "1.2.0"
    }
  ],
  "version": "0.1.0"
}