feat build: drop GCC 10 support

Now the minimally version is GCC 11.1, which is the stock compiler on Ubuntu 22.04.

Notably, GCC 10 is the stock compiler on Ubuntu 22.04 specifically in GitHub CI.
commit_hash:43ac5ac25dd0489d5ffe4e2fba3548895c7562bf

Author: Anton3

.github/workflows/ci.yml

@@ -86,25 +86,6 @@ jobs:
                     tests-flags: '--gtest_filter=-LoggingTest.Format:LoggingTest.CallFormat'
                     tests-env: ''
 
-                  # GCC-10 - testing minimal required compiler
-                  - cmake-flags: >-
-                        -GNinja
-                        -DCMAKE_CXX_COMPILER=g++-10
-                        -DCMAKE_C_COMPILER=gcc-10
-                        -DCMAKE_BUILD_TYPE=Release
-                        -DCMAKE_CXX_STANDARD=20
-                        -DUSERVER_USE_LD=gold
-                        -DUSERVER_BUILD_ALL_COMPONENTS=1
-                        -DUSERVER_BUILD_SAMPLES=1
-                        -DUSERVER_BUILD_TESTS=1
-                        -DUSERVER_FEATURE_YDB=0
-                        -DUSERVER_NO_WERROR=1
-                    os: ubuntu-22.04
-                    info: g++-10 + release
-                    id: ubuntu22_gcc10_release
-                    tests-flags: '--gtest_filter=-StackUsageMonitorTest.BacktraceLogging'
-                    tests-env: ''
-
         name: '${{matrix.os}}: ${{matrix.info}}'
         runs-on: ${{matrix.os}}
 

scripts/docs/en/userver/supported_platforms.md

@@ -8,7 +8,7 @@
 |--|-----------------------------|
 | **OS** | Ubuntu, Debian, Fedora, Arch, Gentoo, macOS |
 | **Architectures** | x86, x86_64, AArch64, Arm |
-| **Compilers** | GCC-10.1 and newer, Clang-14 and newer |
+| **Compilers** | GCC-11.1 and newer, Clang-14 and newer |
 | **C++ Standards** | C++17, C++20, C++23 |
 | **C++ Standard Libraries** | libstdc++, libc++ |