volk: add 1.3.239.0 + modernize more for conan v2

[SpaceIm]

Specify library name and version: lib/1.0

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• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[SpaceIm]

draft until #16523 is merged

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 4 (8bfa6d34db61a049ea857fc0526b9868b64f7ef9):

• volk/1.3.231.1@:
  All packages built successfully! (All logs)

• volk/1.3.224.0@:
  All packages built successfully! (All logs)

• volk/1.2.170@:
  All packages built successfully! (All logs)

• volk/1.2.162@:
  All packages built successfully! (All logs)

• volk/1.3.236.0@:
  All packages built successfully! (All logs)

• volk/1.2.182@:
  All packages built successfully! (All logs)

• volk/1.2.190@:
  All packages built successfully! (All logs)

• volk/1.3.224.1@:
  All packages built successfully! (All logs)

• volk/1.2.198@:
  All packages built successfully! (All logs)

• volk/1.2.195@:
  All packages built successfully! (All logs)

• volk/1.3.204@:
  All packages built successfully! (All logs)

• volk/1.2.140@:
  All packages built successfully! (All logs)

• volk/1.3.216.0@:
  All packages built successfully! (All logs)

• volk/1.3.239.0@:
  All packages built successfully! (All logs)

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Conan v2 pipeline (informative, not required for merge) ✔️

Note: Conan v2 builds are informative and they are not required for the PR to be merged.

All green in build 2 (8bfa6d34db61a049ea857fc0526b9868b64f7ef9):

• volk/1.3.236.0@:
  All packages built successfully! (All logs)

• volk/1.3.239.0@:
  All packages built successfully! (All logs)

• volk/1.3.231.1@:
  All packages built successfully! (All logs)

• volk/1.3.224.0@:
  All packages built successfully! (All logs)

• volk/1.3.224.1@:
  All packages built successfully! (All logs)

• volk/1.2.195@:
  All packages built successfully! (All logs)

• volk/1.2.198@:
  All packages built successfully! (All logs)

• volk/1.3.216.0@:
  All packages built successfully! (All logs)

• volk/1.3.204@:
  All packages built successfully! (All logs)

• volk/1.2.140@:
  All packages built successfully! (All logs)

• volk/1.2.190@:
  All packages built successfully! (All logs)

• volk/1.2.182@:
  All packages built successfully! (All logs)

• volk/1.2.170@:
  All packages built successfully! (All logs)

• volk/1.2.162@:
  All packages built successfully! (All logs)