Remove CircleCI config (#513)

Move build scripts to the tools directory.

Co-authored-by: Anthony Mirabella <a9@aneurysm9.com>

Makefile

@@ -59,10 +59,10 @@ ci: precommit check-clean-work-tree test-with-coverage test-386
 
 .PHONY: test-gocql
 test-gocql:
-	@if ./.circleci/should_build.sh gocql; then \
+	@if ./tools/should_build.sh gocql; then \
 	  set -e; \
 	  docker run --name cass-integ --rm -p 9042:9042 -d cassandra:3; \
-	  CMD=cassandra IMG_NAME=cass-integ ./.circleci/wait.sh; \
+	  CMD=cassandra IMG_NAME=cass-integ ./tools/wait.sh; \
 	  (cd instrumentation/github.com/gocql/gocql/otelgocql && \
 	    $(GOTEST_WITH_COVERAGE) . && \
 	    go tool cover -html=coverage.txt -o coverage.html); \
@@ -71,10 +71,10 @@ test-gocql:
 
 .PHONY: test-mongo-driver
 test-mongo-driver:
-	@if ./.circleci/should_build.sh mongo-driver; then \
+	@if ./tools/should_build.sh mongo-driver; then \
 	  set -e; \
 	  docker run --name mongo-integ --rm -p 27017:27017 -d mongo; \
-	  CMD=mongo IMG_NAME=mongo-integ ./.circleci/wait.sh; \
+	  CMD=mongo IMG_NAME=mongo-integ ./tools/wait.sh; \
 	  (cd instrumentation/go.mongodb.org/mongo-driver/mongo/otelmongo && \
 	    $(GOTEST_WITH_COVERAGE) . && \
 	    go tool cover -html=coverage.txt -o coverage.html); \
@@ -83,10 +83,10 @@ test-mongo-driver:
 
 .PHONY: test-gomemcache
 test-gomemcache:
-	@if ./.circleci/should_build.sh gomemcache; then \
+	@if ./tools/should_build.sh gomemcache; then \
 	  set -e; \
 	  docker run --name gomemcache-integ --rm -p 11211:11211 -d memcached; \
-	  CMD=gomemcache IMG_NAME=gomemcache-integ  ./.circleci/wait.sh; \
+	  CMD=gomemcache IMG_NAME=gomemcache-integ  ./tools/wait.sh; \
 	  (cd instrumentation/github.com/bradfitz/gomemcache/memcache/otelmemcache && \
 	    $(GOTEST_WITH_COVERAGE) . && \
 	    go tool cover -html=coverage.txt -o coverage.html); \