Remove CentOS Stream 8 support (EOL) (vitabaks#674)

.github/workflows/molecule.yml

@@ -52,9 +52,6 @@ jobs:
           - distro: centosstream9
             tag: latest
             namespace: glillico
-          - distro: centosstream8
-            tag: latest
-            namespace: glillico
 
     steps:
       - name: Set TERM environment variable

.github/workflows/molecule_pg_upgrade.yml

@@ -48,9 +48,6 @@ jobs:
           - distro: centosstream9
             tag: latest
             namespace: glillico
-          - distro: centosstream8
-            tag: latest
-            namespace: glillico
 
     steps:
       - name: Set TERM environment variable

README.md

@@ -90,9 +90,8 @@ RedHat and Debian based distros (x86_64)
 ###### Supported Linux Distributions:
 - **Debian**: 10, 11, 12
 - **Ubuntu**: 20.04, 22.04
-- **CentOS**: 7, 8
-- **CentOS Stream**: 8, 9
-- **Oracle Linux**: 7, 8, 9
+- **CentOS Stream**: 9
+- **Oracle Linux**: 8, 9
 - **Rocky Linux**: 8, 9
 - **AlmaLinux**: 8, 9
 
@@ -109,7 +108,6 @@ _Table of results of daily automated testing of cluster deployment:_
 | Debian 12    | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_debian11.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_debian12.yml) |
 | Ubuntu 20.04 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_ubuntu2004.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_ubuntu2004.yml) |
 | Ubuntu 22.04 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_ubuntu2204.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_ubuntu2204.yml) |
-| CentOS Stream 8 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_centosstream8.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_centosstream8.yml) |
 | CentOS Stream 9 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_centosstream9.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_centosstream9.yml) |
 | Oracle Linux 8 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_oracle_linux8.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_oracle_linux8.yml) |
 | Oracle Linux 9 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_oracle_linux9.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_oracle_linux9.yml) |