release: removing dev tag from 1.7.0 (envoyproxy#3686)

Also removing "pending" from
DEPRECATED.md
and
docs/root/intro/version_history.rst

Risk Level: n/a
Testing: Will wait for LGTM from whoever canaries at Lyft
Docs Changes: n/a
Release Notes: cut.

Signed-off-by: Alyssa Wilk <[email protected]>

docs: final tag for release (envoyproxy#2862)

Signed-off-by: Matt Klein <[email protected]>

pgv: validation support for Bootstrap/xDS/filters. (envoyproxy#2146)

This patch lands checking via https://github.com/lyft/protoc-gen-validate in Envoy for bootstrap, xDS ingestion and during filter instantiation.

Risk Level: Medium (things might start blowing up on config ingestion that were slipping through before).
Testing: Mostly negative tests for bootstrap/xDS/filters, since the happy path is already validated through the existing test suite.

Signed-off-by: Harvey Tuch <[email protected]>

Using common member variables in integration tests (envoyproxy#1532)

docs: 1.3.0 release notes (envoyproxy#926)

Envoy Rate Limit: Enable stage setting matching. (envoyproxy#532)

docs: 1.1.0 release notes (envoyproxy#259)

docs: final updates for 1.0.0 (envoyproxy#59)