Merge pull request #6122 from RosettaCommons/roccomoretti/update_rdkit Update RDKit Due to interest, update the version of RDKit to 2021.03.5. This version is the same one being used in Foldit (PR #5590) and should be C++14 compatible. Compilation issues seem to be sorted out if I explicitly ignore some of the new subdirectories in RDKit, which should be okay-ish, as they aren't used elsewhere in RDKit, and aren't used currently by Rosetta. (More extensive fixes may be necessary if we start to use those features.)

• Summary
• code_quality.clang_tidy 「3」
• integration.mpi 「1」
• integration.release_debug 「2」
• integration.tutorials 「1」
• integration.ubsan 「1」
• integration 「2」
• mac.clang.unit.release 「4」
• gcc-11.gcc.python39.unit 「4」
• gcc-9.gcc.unit 「4」
• linux.clang.unit 「4」
• m1.clang.python39.unit 「4」
• mac.clang.unit 「4」
• ubuntu-20.04.gcc.python39.unit 「4」