adding acceptance test section in make and readme

Author: Vasundharashukla

Makefile

@@ -25,6 +25,11 @@ vet:
 lint: gofmt
 	golangci-lint run -c ./.golangci.yml ./internal/... .
 
+set-tf-acc:
+   TF_ACC=true
+
+acc-test: | set-tf-acc test
+
 website-lint:
 	@echo "==> Checking website against linters..."
 	@misspell -error -source=text website/ || (echo; \

README.md

@@ -86,15 +86,15 @@ provider.
 **Flattening and Helper Tests:** These can be run by `make test` directly.
 
 **Acceptance Tests:** Set the environment variables in your IDE configurations or Terminal.
-Environment variables that are required to be set universally are `TMC_ENDPOINT`, `TMC_CSP_ENDPOINT`, `TMC_CSP_TOKEN` and `TF_ACC`. `TF_ACC` has to be set as `true`. 
+Environment variables that are required to be set universally are `TMC_ENDPOINT`, `TMC_CSP_ENDPOINT` and `TMC_CSP_TOKEN`.
 
 Environment variables specific to particular resources:
 
 - **Attach Cluster with Kubeconfig and Namespace Resource** - `KUBECONFIG`  
 - **TKGs workload cluster** - `MANAGEMENT_CLUSTER`, `PROVISIONER_NAME`, `VERSION` and `STORAGE_CLASS`.
 - **TKGm Vsphere workload cluster** - `MANAGEMENT_CLUSTER` and `CONTROL_PLANE_ENDPOINT`.
 
-After the environment variables are set, run the respective tests.
+After the environment variables are set, run `make acc-test`.
 
 ## Provider Documentation