Issue #3112452 by lalitware, guilhermevp, narendra.rajwar27, WagnerMelo, ravi.shankar, mradcliffe, adalbertov, himanshu_sindhwani, quondam, Vidushi Mehta, alexpott, longwave, anmolgoyal74: Fix indentation consistency in core's yaml files

Revert "Issue #3022910 by quietone, juampynr, chandrashekhar_srijan, alisonjo315, heddn, benjifisher: Prevent migrated files from having an incorrect value at file_managed.filename"

This reverts commit 286129f8.

Issue #3022910 by quietone, juampynr, chandrashekhar_srijan, alisonjo315, heddn, benjifisher: Prevent migrated files from having an incorrect value at file_managed.filename

Issue #2936365 by quietone, mikelutz, heddn, larowlan, masipila, effulgentsia, maxocub, Gábor Hojtsy, webchick, phenaproxima, jhodgdon, catch: Migrate UI - allow modules to declare the state of their migrations

Issue #2711099 by heddn, Jo Fitzgerald, edysmp, edgewl2, alexpott, Charlotte17, mikeryan, masipila, quietone, maxocub, phenaproxima: Categorize migrations according to their type

Issue #2876085 by heddn, maxocub, phenaproxima, Jo Fitzgerald, vasi, quietone, yoroy, masipila, larowlan, neclimdul, krystalcode, catch: Before upgrading, audit for potential ID conflicts

Issue #2917883 by quietone, TR, Jo Fitzgerald, masipila, phenaproxima: Rename 'migration_templates' directories in core modules to 'migrations'