77007 Move iOS Flutter.framework thinning into copy assemble build target (cla: yes, platform-ios, t: xcode, tool, waiting for tree to go green)

77011 Fix typo in web template (cla: yes, tool, waiting for tree to go green)

77025 Update minimum required version to Xcode 12 (cla: yes, t: xcode, tool, waiting for tree to go green)

77027 Enable missing_whitespace_between_adjacent_strings (cla: yes, f: material design, framework, team, tool)

77064 [flutter_tools] remove mock from logger tests (cla: yes, tool)

77066 [flutter_tools] remove chrome launcher, analytics mock from web unit tests (cla: yes, tool, waiting for tree to go green)