Add max-empty-lines and no-eol-whitespace to stylelint (#7034)

res/css/views/rooms/_EventTile.scss

@@ -401,7 +401,6 @@ $left-gutter: 64px;
     cursor: pointer;
 }
 
-
 .mx_EventTile_e2eIcon {
     position: relative;
     width: 14px;
@@ -581,7 +580,6 @@ $left-gutter: 64px;
     color: inherit;
 }
 
-
 /* Make h1 and h2 the same size as h3. */
 .mx_EventTile_content .markdown-body h1,
 .mx_EventTile_content .markdown-body h2 {
@@ -613,7 +611,6 @@ $left-gutter: 64px;
 
 /* end of overrides */
 
-
 .mx_EventTile_keyRequestInfo {
     font-size: $font-12px;
 }
@@ -731,8 +728,6 @@ $left-gutter: 64px;
     }
 }
 
-
-
 .mx_ThreadView {
     display: flex;
     flex-direction: column;