Fix TestNativeHistogramFuzz to cover queries that contain count_values

[SungJin1212]

This PR fixes TestNativeHistogramFuzz test to cover queries that contain count_values.
For example, the query

count_values(
            "value",
            avg without (status_code, series) (
              (
                  {__name__="test_series_a"} offset 2m30s
                unless
                  {__name__="test_series_a",status_code="404"} offset 2m11s
              )
            )
          )

the result is

status": "success",
    "data": {
        "resultType": "matrix",
        "result": [
            {
                "metric": {
                    "value": "{count:102, sum:202.39999999999998, [-4,-2.82842712474619):11, [-2.82842712474619,-2):11, [-1.414213562373095,-1):12, [-1,-0.7071067811865475):11, [-0.001,0.001]:12, (0.7071067811865475,1]:11, (1,1.414213562373095]:12, (2,2.82842712474619]:11, (2.82842712474619,4]:11}"
                },
                "values": [
                    [
                        1747623681,
                        "1"
                    ]
                ]
            },

So, we need to cover this case in TestNativeHistogramFuzz.

Which issue(s) this PR fixes:
Fixes #6724

Checklist

• Tests updated
• [NA] Documentation added
• [NA] CHANGELOG.md updated - the order of entries should be [CHANGE], [FEATURE], [ENHANCEMENT], [BUGFIX]

[yeya24]

@harry671003 Can you help take a look at this?

[harry671003]

Instead of using a regex here can we use parser.ParseSeriesDesc() to parse this into a real histogram?

See: https://github.com/prometheus/prometheus/blob/main/promql/parser/parse.go#L252

value := r.Metric.Get("value")
lbls, val, err := parser.ParseSeriesDesc(value)

This worked for me.

[SungJin1212]

Thanks, but it doesn't seem to work for me..
The query result is like:

status": "success",
    "data": {
        "resultType": "matrix",
        "result": [
            {
                "metric": {
                    "value": "{count:102, sum:202.39999999999998, [-4,-2.82842712474619):11, [-2.82842712474619,-2):11, [-1.414213562373095,-1):12, [-1,-0.7071067811865475):11, [-0.001,0.001]:12, (0.7071067811865475,1]:11, (1,1.414213562373095]:12, (2,2.82842712474619]:11, (2.82842712474619,4]:11}"
                },
                "values": [
                    [
                        1747623681,
                        "1"
                    ]
                ]
            },

I got the error: err 1:7: parse error: unexpected character inside braces: ':' when the input of ParseSeriesDesc . is "{count:102, sum:202.39999999999998, [-4,-2.82842712474619):11, [-2.82842712474619,-2):11, [-1.414213562373095,-1):12, [-1,-0.7071067811865475):11, [-0.001,0.001]:12, (0.7071067811865475,1]:11, (1,1.414213562373095]:12, (2,2.82842712474619]:11, (2.82842712474619,4]:11}".

[yeya24]

Probably parser.ParseSeriesDesc doesn't support NH format now. We can go ahead with the regex I think

[harry671003]

You're right. I was mistaken earlier.

[yeya24]

Thanks a lot!