INSERT INTO ... SELECT fails when auto_explain is configured with auto_explain.log_analyze = true.

Regression runs surfaced that with the following auto_explain configuration, INSERT INTO ... SELECT commands fail.

> shared_preload_libraries = 'citus,pg_stat_statements,auto_explain'
> auto_explain.log_min_duration = 0 // Setting this to 0 logs all plans.-1 (the default) disables logging of plans
> auto_explain.log_analyze = true

Repro steps:

1. Configure auto_explain with analyze option tuned on.
2. Run an INSERT INTO ... SELECT query. E.g:

CREATE TABLE source_table(a int);
SELECT create_distributed_table('source_table', 'a');
INSERT INTO source_table SELECT * FROM generate_series(1, 10);

**Expected**:
source_table should have 10 rows.
**Observed** :
> INSERT INTO source_table SELECT * FROM generate_series(1, 10);
ERROR: EXPLAIN ANALYZE is currently not supported for INSERT ... SELECT commands via coordinator
> select count(*) from source_table;
count
-------
0
(1 row)

This query should still work even though the explain analyze fails silently.