## Bug description

The grouped-by-month view in charts is hella confusing. The x-axis shows a date that does not reflect the value on the y-axis.

1. the y-axis shows the number for the END of the month
2. the x-axis reads as "beginning of the month"

![CleanShot 2024-02-05 at 10 23 30@2x](https://github.com/PostHog/posthog/assets/35429197/d78df745-8319-4b78-95fa-d96f18aee357)

### Comparison with daily grouping

Compare the "group by month" view with "group by day". The x-axis labeling aligns with the y-axis values. 

![CleanShot 2024-02-05 at 10 29 20@2x](https://github.com/PostHog/posthog/assets/35429197/998825fa-7406-4214-8310-8f173980f80c)


## How to reproduce

1. Group a chart by month 
2. select "unique events"

## Proposal 

### 1. easy fix - remove the "1." from the labelling

- will still confuse readers with "is this the beginning or end of the month"

![CleanShot 2024-02-05 at 10 23 30@2x](https://github.com/PostHog/posthog/assets/35429197/1a0ae6d4-0e02-4b32-86ab-7b0e069655ed)

### 2. correct fix - show end of month

- removes ambiguity from "is that the beginning or end of month"
- harder to implement because months have different end days

![CleanShot 2024-02-05 at 10 23 30@2x](https://github.com/PostHog/posthog/assets/35429197/61226346-7f97-4bcd-87bf-53fc83c75245)


cc @jannesblobel
posthog/hogql_queries/insights/lifecycle_query_runner.py
response = execute_hogql_query(
            query_type="LifecycleQuery",
            query=query,
            team=self.team,
            timings=self.timings,
            modifiers=self.modifiers,
        )
        
        
        
        order = {"new": 1, "returning": 2, "resurrecting": 3, "dormant": 4}
        results = sorted(response.results, key=lambda result: order.get(result[2], 5))
        res = []
        for val in results:
            counts = val[1]
            labels = [
                item.strftime("%-d-%b-%Y{}".format(" %H:%M" if self.query_date_range.interval_name == "hour" else ""))
                for item in val[0]
            ]
            days = [
                item.strftime("%Y-%m-%d{}".format(" %H:%M:%S" if self.query_date_range.interval_name == "hour" else ""))
                for item in val[0]
            ]
            
            action_object = {}
            label = "{} - {}".format("", val[2])
            if isinstance(self.query.series[0], ActionsNode):
                action = Action.objects.get(pk=int(self.query.series[0].id), team=self.team)
                label = "{} - {}".format(action.name, val[2])
                action_object = {