Add a with_extras option to the ICU package

[datalogics-robb]

ICU is configured with --disable-extras by default, and this PR makes
it possible to turn it on with the option "icu:with_extras=True".

Specify library name and version: icu/70.1 (and earlier)

ICU's configure script will enable this option by default, which will create the "uconv" command-line tool
for doing text conversions. This option preserves the current behavior by defaulting to "False" but allows it to be turned on explicitly.

---

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
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• I've tried at least one configuration locally with the
  conan-center hook activated.

[SpaceIm]

ICU's configure script will enable this option by default, which will create the "uconv" command-line tool
for doing text conversions. This option preserves the current behavior by defaulting to "False" but allows it to be turned on explicitly.

Therefore in package_info(), you should replace:

            bin_path = os.path.join(self.package_folder, "bin")
            self.output.info("Appending PATH environment variable: {}".format(bin_path))
            self.env_info.PATH.append(bin_path)

by

        if self._enable_icu_tools or self.options.with_extras:
            bin_path = os.path.join(self.package_folder, "bin")
            self.output.info("Appending PATH environment variable: {}".format(bin_path))
            self.env_info.PATH.append(bin_path)

and

            if self._enable_icu_tools:
                self.buildenv_info.prepend_path("ICU_DATA", data_path)

by

            if self._enable_icu_tools or self.options.with_extras:
                self.buildenv_info.prepend_path("ICU_DATA", data_path)

[datalogics-robb]

I can't see what it thinks is wrong here - was it a problem with CI or with the code in the PR?

[SpaceIm]

I can't see what it thinks is wrong here - was it a problem with CI or with the code in the PR?

CI issue. Close/Open until it works.

[conan-center-bot]

All green in build 5 (009cf3285eb6e6be762265d7416cf1521a204a33):

• icu/65.1@:
  All packages built successfully! (All logs)

• icu/64.2@:
  All packages built successfully! (All logs)

• icu/67.1@:
  All packages built successfully! (All logs)

• icu/68.1@:
  All packages built successfully! (All logs)

• icu/70.1@:
  All packages built successfully! (All logs)

• icu/69.1@:
  All packages built successfully! (All logs)

• icu/66.1@:
  All packages built successfully! (All logs)

• icu/68.2@:
  All packages built successfully! (All logs)