Revert "Allow basefee as Yul identifier for EVMVersion < london"

This reverts commit 7f1a2be0fe.

Added changes to changelog to include Make basfee as a reserved identifier

added changes under the breaking changes rst file

Update Changelog.md

Co-authored-by: Harikrishnan Mulackal <webmail.hari@gmail.com>

Update 090-breaking-changes.rst

moved the changes under "New restrictions" section

Update Changelog.md

avoided removing  line no 6

Update docs/090-breaking-changes.rst

Co-authored-by: Alex Beregszaszi <alex@rtfs.hu>

test/libsolidity/syntaxTests/types/magic_block_basefee_error.sol

@@ -2,8 +2,15 @@ contract C {
     function f() public view returns (uint) {
         return block.basefee;
     }
+    function g() public view returns (uint ret) {
+        assembly {
+            ret := basefee()
+        }
+    }
 }
 // ====
-// EVMVersion: <=berlin
+// EVMVersion: =berlin
 // ----
 // TypeError 5921: (74-87): "basefee" is not supported by the VM version.
+// TypeError 5430: (183-190): The "basefee" instruction is only available for London-compatible VMs (you are currently compiling for "berlin").
+// DeclarationError 8678: (176-192): Variable count for assignment to "ret" does not match number of values (1 vs. 0)