Merge pull request #5803 from crazy-max/0.20_picks_0.20.1

[v0.20] cherry-picks for v0.20.1

Merge pull request #5803 from crazy-max/0.20_picks_0.20.1

[v0.20] cherry-picks for v0.20.1

Merge pull request #5803 from crazy-max/0.20_picks_0.20.1

[v0.20] cherry-picks for v0.20.1

Merge pull request #5761 from jsternberg/v0.20.0-picks

[v0.20] cherry-picks for v0.20.0

Merge pull request #5761 from jsternberg/v0.20.0-picks

[v0.20] cherry-picks for v0.20.0

Merge pull request #5761 from jsternberg/v0.20.0-picks

[v0.20] cherry-picks for v0.20.0

Merge pull request #5755 from crazy-max/0.20_backport_rc3

[v0.20] cherry-picks 0.20.0-rc3

Merge pull request #5755 from crazy-max/0.20_backport_rc3

[v0.20] cherry-picks 0.20.0-rc3

Merge pull request #5755 from crazy-max/0.20_backport_rc3

[v0.20] cherry-picks 0.20.0-rc3

Merge pull request #5738 from crazy-max/dockerfile-device-error-nolabs

dockerfile: error out if device feature not used in labs