[main] Update libsigc++20 --> libsigc++30 v3.2.0; glibmm24 --> glibmm v 2.70.0; glib-networking v2.70.0 (#2204)
* update glibmm24 to v2.70.0
* glibmm24 wip, need libsigc++30
* add libsigc++30.spec
* working mock build
* update glibmm24 to v2.70.0
* glibmm24 wip, need libsigc++30
* add libsigc++30.spec
* working mock build
* switch over to libsigc++30
* finish deprecating libsigc++20
* libsig and glibmm mock building
* refactor glibmm24 --> glibmm; add doc subpackage to libsig and glibmm
* update glib-networking
* add untracked glibmm gsettings-desktop-schemas
* attempt to maybe fix the manifests potentially >:d
* make gnutls build with pkcs 11 standard; glib-networking builds
* update license
* clean up changelogs, spec details
* Update SPECS/glibmm/glibmm.spec
Co-authored-by: Pawel Winogrodzki <pawelwi@microsoft.com>
* Update SPECS/glibmm/glibmm.spec
Co-authored-by: Pawel Winogrodzki <pawelwi@microsoft.com>
* remove unnecessary ca-certificates import
* verify licenses
* verify pangomm
* lint gsettings-desktop-schemas
Co-authored-by: Pawel Winogrodzki <pawelwi@microsoft.com>