Fix gitClone error logging and improve code quality

[amuravski]

Fixed error logging in the gitClone function. The previous implementation incorrectly assumed an error property on the spawnSync result object when a git clone operation failed.
Reduced code duplication in the gitClone function.

Successful spawnSync Result example

{
  status: 0,
  signal: null,
  output: [
    null,
    '',
    "Cloning into 'C:\\Users\\user\\AppData\\Local\\Temp\\vulnado.gitICn14i'...\n"
  ],
  pid: 7880,
  stdout: '',
  stderr: "Cloning into 'C:\\Users\\user\\AppData\\Local\\Temp\\vulnado.gitICn14i'...\n"
}

spawnSync Result with Error example

{
  status: 128,
  signal: null,
  output: [
    null,
    '',
    "Cloning into 'C:\\Users\\user\\AppData\\Local\\Temp\\vul nado.gitmRacDG'...\n" +
      "fatal: unable to access 'https://github.com/ScaleSec/vul nado.git/': URL rejected: Malformed input to a URL function\n"
  ],
  pid: 11532,
  stdout: '',
  stderr: "Cloning into 'C:\\Users\\user\\AppData\\Local\\Temp\\vul nado.gitmRacDG'...\n" +
    "fatal: unable to access 'https://github.com/ScaleSec/vul nado.git/': URL rejected: Malformed input to a URL function\n"
}

[prabhu]

Thank you so much. Looks very neat!

[prabhu]

Could you kindly sign the commit using the instructions in the below link?

https://github.com/CycloneDX/cdxgen/pull/1366/checks?check_run_id=29862579409

[prabhu]

Also run pnpm lint && pnpm run gen-types

[amuravski]

Linter warnings have been fixed and commits are finally signed :)