MDEV-34112 Replace one operator name keyword

Alternative operator name keywords like `and`, `or`, `xor`, etc., are
uncommon in MariaDB and can cause obscure build errors when the GCC
flag `-fno-operator-names` is applied.

Description of `-fno-operator-names`:
https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html
> Do not treat the operator name keywords `and`, `bitand`, `bitor`,
> `compl`, `not`, `or` and `xor` as synonyms as keywords.

Part of the build errors:

    /local/p4clients/pkgbuild-LdLa_/workspace/src/RDSMariaDB/sql/sql_select.cc:11171:28: error: expected ‘)’ before ‘and’
    11171 |     DBUG_ASSERT(sel >= 0.0 and sel <= 1.00001);
          |                            ^~~
    /local/p4clients/pkgbuild-LdLa_/workspace/src/RDSMariaDB/include/my_global.h:372:44: note: in definition of macro ‘unlikely’
      372 | #define unlikely(x)     __builtin_expect(((x) != 0),0)
          |                                            ^
    ...

The build failure is caused by using alternative operator name keywords
`and` introduced in commit b66cdbd1.
Replace the `and` keyword with `&&` and target on MariaDB 11.0+ branches
which include the commit.

All new code of the whole pull request, including one or several files
that are either new files or modified ones, are contributed under the
BSD-new license. I am contributing on behalf of my employer
Amazon Web Services, Inc.

sql/sql_select.cc

@@ -11125,7 +11125,7 @@ double table_after_join_selectivity(JOIN *join, uint idx, JOIN_TAB *s,
   else
   {
     sel= records_out / pos->records_read;
-    DBUG_ASSERT(sel >= 0.0 and sel <= 1.00001);
+    DBUG_ASSERT(sel >= 0.0 && sel <= 1.00001);
     if (sel > 1.0)
       sel= 1.0;
   }