Fluentd fails to load separate gems with same @type name

### Describe the bug

I have installed two splunk gems, namely, fluent-plugin-splunk-enterprise and fluent-plugin-splunk-hec. Both the gems (even though 2 separate gems) have types with same name `splunk_hec`. Even though the type names are same, they have different parameters, that makes them distinct.
But when I use @type splunk_hec in my fluentd configuration with the parameters of fluent-plugin-splunk-enterprise, it fails to recognize them and throws below error:
```yaml
2025-11-06 17:05:28 +0000 [error]: config error file="/etc/fluent/fluentd.conf" error_class=Fluent::ConfigError error="'hec_token' parameter is required"
```

It asks for `hec_token`, which is basically a parameter of fluent-plugin-splunk-hec and not fluent-plugin-splunk-enterprise.

### To Reproduce

This bug can be reproduced by simply installing both these gems:
- fluent-gem install fluent-plugin-splunk-hec
- fluent-gem install fluent-plugin-splunk-enterprise

Fluentd will automatically register the @type name from first gem and ignore the second one. (which is happening in my case)

### Expected behavior

Now, I do understand that this is a known behavior of fluentd and it has been like that for some time. So, this understanding brings me to a question that **is there a workaround for this without having to remove any one of the 2 gems?**

**Is there a way that we can install both gems and use them in our configuration without conflicting with each other??**

### Your Environment

```markdown
- Fluentd version: 1.19.0
- Package version: 6.0.0
- Operating system: Rocky 8
- Kernel version: 5
```

### Your Configuration

```apache

@type splunk_hec
protocol http
host "example.com"
port 8088
token 00000000-0000-0000-0000-000000000000
sourcetype "_json"

@type memory
flush_interval 10s
retry_max_times 2
retry_wait 1s

```

### Your Error Log

```shell
2025-11-06 17:05:28 +0000 [error]: config error in:

@type splunk_hec
protocol http
host "example.com"
port 8088
token 00000000-0000-0000-0000-000000000000
sourcetype "_json"

@type memory
flush_interval 10s
retry_max_times 2
retry_wait 1s

2025-11-06 17:05:28 +0000 [error]: config error file="/etc/fluent/fluentd.conf" error_class=Fluent::ConfigError error="'hec_token' parameter is required"
```

### Additional context

I am well aware of the workaround by forking the fluent-plugin-splunk-enterprise and renaming the type, and then building the gem. But this workaround is not feasible and convenient for my use case.
I am much interested in a solution where fluentd handles this internally or we handle it internally without having to make modifications in the gem.