### Description

The parsing of params in parameterized ES|QL queries appears to be inconsistent with the parsing of non-parameterized ES|QL queries. Some examples on current main:

- ```
  {"query": "row a = 1 | eval x = now() + ?", "params": [{"type":"time_duration", "value":"5 hour"}]}
  ```
  results in the following exception:
  ```
  "type":"parsing_exception","reason":"line 1:23: Cannot cast value [5 hour] of type [KEYWORD] to parameter type [TIME_DURATION]"}],"type":"parsing_exception","reason":"line 1:23: Cannot cast value [5 hour] of type [KEYWORD] to parameter type [TIME_DURATION]"
  ```
- ```
  {"query": "row a = 1 | eval x = now() + ?", "params": ["1 week"]}
  ```
  results in
  ```
  "type":"verification_exception","reason":"Found 1 problem\nline 1:22: [+] has arguments with incompatible types [DATETIME] and [KEYWORD]"
  ```
- ```
  "query": "row a = 1 | eval x = now() + ? week", "params": [1]
  ```
  results in
  ```
  "type":"parsing_exception","reason":"line 1:32: extraneous input 'week' expecting <EOF>"}],"type":"parsing_exception","reason":"line 1:32: extraneous input 'week' expecting <EOF>"
  ```

All the queries work fine if the `?` is manually substituted with the given parameter.

The first two indicate that the parsing of query parameters is not consistent with our normal parsing, type resolution and verification pipeline.

According to @astefan , `version` is affected in a similar way.

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/parser/StatementParserTests.java
new Alias(EMPTY, "b", new UnresolvedFunction(EMPTY, "min", DEFAULT, List.of(attribute("a")))),
                    attribute("c"),
                    attribute("d.e")
                )
            ),
            processingCommand("stats b = min(a) by c, d.e")
        );
    }
    public void testStatsWithoutGroups() {
        assertEquals(
            new Aggregate(
                EMPTY,
                PROCESSING_CMD_INPUT,
                List.of(),
                List.of(
                    new Alias(EMPTY, "min(a)", new UnresolvedFunction(EMPTY, "min", DEFAULT, List.of(attribute("a")))),
                    new Alias(EMPTY, "c", integer(1))
                )
            ),
            processingCommand("stats min(a), c = 1")
        );
    }
    public void testStatsWithoutAggs() throws Exception {
        assertEquals(
            new Aggregate(EMPTY, PROCESSING_CMD_INPUT, List.of(attribute("a")), List.of(attribute("a"))),
            processingCommand("stats by a")
        );
    }
    public void testStatsWithoutAggsOrGroup() throws Exception {
        expectError("from text | stats", "At least one aggregation or grouping expression required in [stats]");